Chem test 4-5

Question 1

The masses of the elements in a compound are always in the same ratio, this ratio is unique to each compound

Answer 1

Law of definite proportion

Question 2

The symbol for the atomic number

Answer 2

Z

Question 3

The symbol for the mass number

Answer 3

A

Question 3

The symbol for the number of nuetrons

Answer 3

N

Question 4

Isotope name and notation

Answer 4

carbon-12 and
A
X
Z

Question 5

A whole number is equal to the sum of the protons and neutrons in the nucleus of a particular isotope of an element

Answer 5

Mass Number

Question 6

atoms of the same element that have the same number of protons but different number of neutrons

Answer 6

Isotopes

Question 7

A decimal number equal to the weighted average of the naturally occurring isotopes according to their percent abundance

Answer 7

Atomic mass

Question 8

Protons Electrons and Neutrons of Silicon-28

Answer 8

14P 14E 14N

Question 9

Protons Electrons and Neutrons of Calcium-44

Answer 9

20P 20E 24N

Question 10

Who conceived the idea of atoms?

Answer 10

Democritus

Question 11

The 3 subatomic particles in order of least mass to greatest

Answer 11

Electron, Proton, Neutron

Question 12

The number of protons in each atom and its identity

Answer 12

Atomic Number

Question 13

The sum of protons and neutrons in the nucleus of the atom

Answer 13

Mass number

Question 13

Law of definite proportion

Answer 13

Each chemical has a unique composition by mass

Question 14

The weighted average mass of the elements naturally accruing isotopes

Answer 14

Atomic mass

Question 15

Atoms with an equal amount of protons and electrons

Answer 15

Neutral atoms

Question 16

how many protons and neutrons are present:
9
Be
4

Answer 16

4P 5N 4E

Question 17

How many protons and neutrons are present
45
Sc
21

Answer 17

21P 24N 21E

Question 18

Explains why the movements of electrons don’t behave in accordance with classical Newtonian mechanics

Answer 18

Wave-particle duality

Question 19

electron capacity of the S sublevel

Answer 19

2

Question 20

electron capacity of the P sublevel

Answer 20

6

Question 21

electron capacity of the D sublevel

Answer 21

10

Question 22

electron capacity of the F sublevel

Answer 22

14

Question 23

as you add more electrons they need more sublevels

Answer 23

Aufbau Principle

Question 24

Gives each electron its own orbital, but once it starts sharing, they spin opposite directions

Answer 24

Hunts Rule

Question 25

explains why electron pairs in any orbital has to have opposite spins

Answer 25

Pauli Exclusion Principle

Question 26

amount of ground state energy levels

Answer 26

7

Question 27

electron capacity of an orbital

Answer 27

2

Question 28

electron capacity of the first energy level

Answer 28

2

Question 29

electron capacity of the second energy level

Answer 29

8

Question 30

electron capacity of the third energy level

Answer 30

18

Question 31

electron capacity of the fourth energy level

Answer 31

32

Question 32

Arrangement of electrons in an atom of an element in its ground state

Answer 32

Electron configuration

Question 33

Electrons in the highest principal energy level, responsible for many chemical and physical properties in chemical bonding

Answer 33

Valance electrons

Question 34

Lists the sublevels and total number of electrons in all the orbitals in each sublevel

Answer 34

Electron configuration

Question 35

Shows each orbital within every sublevel and accounts for each electron occupying the orbitals

Answer 35

Orbital notation

Question 36

An atom gains additional electrons, resulting in more electrons than protons

Answer 36

Anion (-)

Question 37

An atom loses electrons, resulting in fewer electrons than protons

Answer 37

Cation (+) ## Footnote Ca+ion